Need header ID help..

Demonracer said
From the angle of the tubes to the collector, it resembles a W series truck header. Maybe my eyes are playing tricks on me.

Local "Mr. Hemi" told Me they were early C-body when I acquired it, only had it installed in the Diplomat & minimal bangin' to clear the clutch linkage w/the 383, not sure they'd have worked on an RB....BUT I do have a part#..hence this thread...